The trouble you were experiencing, fatigue, sleeping, a feeling of malaise was all from an infected organ in your body. The low grade infection from the gall bladder or any other organ that is infected, can make you feel very bad. Sometimes, after a surgery an abscess is formed with some patients, That too, can make someone feel awful, even though it is a small encapsulated site. Once it is drained, the patient feels better. Think how much worse, someone with an infected gall bladder or appendix feels.
I agree with your thinking to stay home that extra week and rest. My daughter had laparotomy gall
bladder surgery when she was a teen ager and boy, she really needed the rest. Am I'm pretty much guessing you're not a teenager.
So enjoy your time home, rest, take your meds and drink lots and lots of water for healing and eat fruits and veggies for skin repair as tolerated and lots of protein for cellular repair and get that extra sleep that you need to heal overall. Treat yourself like a patient and not like a man who can accomplish anything. Use care with that treadmill, too.
Believe in yourself. Be kind to fellow humans and animals. Take time to smell the flowers and the coffee.
And by all means, when you are down, ask me for help. I will be there.